Index: DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs
===================================================================
diff -u -r1265 -r1268
--- DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs	(.../DamInput.cs)	(revision 1265)
+++ DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs	(.../DamInput.cs)	(revision 1268)
@@ -2537,6 +2537,10 @@
         
         private double polderLevelField;
         
+        private double polderLevelLowField;
+        
+        private bool polderLevelLowFieldSpecified;
+        
         private double headPl2Field;
         
         private bool headPl2FieldSpecified;
@@ -2623,6 +2627,28 @@
         
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
+        public double PolderLevelLow {
+            get {
+                return this.polderLevelLowField;
+            }
+            set {
+                this.polderLevelLowField = value;
+            }
+        }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlIgnoreAttribute()]
+        public bool PolderLevelLowSpecified {
+            get {
+                return this.polderLevelLowFieldSpecified;
+            }
+            set {
+                this.polderLevelLowFieldSpecified = value;
+            }
+        }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlAttributeAttribute()]
         public double HeadPl2 {
             get {
                 return this.headPl2Field;
Index: DamEngine/trunk/xsd/DamLocation.xsd
===================================================================
diff -u -r1265 -r1268
--- DamEngine/trunk/xsd/DamLocation.xsd	(.../DamLocation.xsd)	(revision 1265)
+++ DamEngine/trunk/xsd/DamLocation.xsd	(.../DamLocation.xsd)	(revision 1268)
@@ -71,6 +71,7 @@
             </xs:simpleType>
           </xs:attribute>
           <xs:attribute name="PolderLevel" type="xs:double" use="required" />
+          <xs:attribute name="PolderLevelLow" type="xs:double" use="optional" />
           <xs:attribute name="HeadPl2" type="xs:double" use="optional" />
           <xs:attribute name="HeadPl3" type="xs:double" use="optional" />
           <xs:attribute name="HeadPl4" type="xs:double" use="optional" />
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs
===================================================================
diff -u -r1265 -r1268
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 1265)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 1268)
@@ -344,6 +344,8 @@
                 location.ModelParametersForPlLines.PlLineCreationMethod = ConversionHelper.ConvertToPhreaticLineCreationMethod(waternetOptions.PhreaticLineCreationMethod);
                 location.IntrusionVerticalWaterPressure = ConversionHelper.ConvertToIntrusionVerticalWaterPressure(waternetOptions.IntrusionVerticalWaterPressure);
                 location.PolderLevel = waternetOptions.PolderLevel;
+                location.PolderLevelLow = waternetOptions.PolderLevelLow;
+                // waternetOptions.PolderLevelLowSpecified is not used because the value is not a nullable
                 location.ModelParametersForPlLines.DampingFactorPl4 = waternetOptions.DampingFactorPL3;
                 location.ModelParametersForPlLines.DampingFactorPl3 = waternetOptions.DampingFactorPL4;
                 location.ModelParametersForPlLines.PenetrationLength = waternetOptions.PenetrationLength;
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs
===================================================================
diff -u -r1265 -r1268
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 1265)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 1268)
@@ -298,6 +298,8 @@
                 waternetOptions.PhreaticLineCreationMethod = ConversionHelper.ConvertToInputPhreaticLineCreationMethod(location.ModelParametersForPlLines.PlLineCreationMethod);
                 waternetOptions.IntrusionVerticalWaterPressure = ConversionHelper.ConvertToInputIntrusionVerticalWaterPressure(location.IntrusionVerticalWaterPressure ?? IntrusionVerticalWaterPressureType.Standard);
                 waternetOptions.PolderLevel = location.PolderLevel;
+                waternetOptions.PolderLevelLow = location.PolderLevelLow;
+                waternetOptions.PolderLevelLowSpecified = true;
                 waternetOptions.DampingFactorPL3 = location.ModelParametersForPlLines.DampingFactorPl4;
                 waternetOptions.DampingFactorPL4 = location.ModelParametersForPlLines.DampingFactorPl3;
                 waternetOptions.PenetrationLength = location.ModelParametersForPlLines.PenetrationLength;
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs
===================================================================
diff -u -r1265 -r1268
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 1265)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 1268)
@@ -245,6 +245,7 @@
                 location.ModelParametersForPlLines.PlLineCreationMethod = (PlLineCreationMethod) i;
                 location.IntrusionVerticalWaterPressure = (IntrusionVerticalWaterPressureType) i;
                 location.PolderLevel = 1.0 * i + 0.11;
+                location.PolderLevelLow = 1.0 * i + 0.09;
                 location.ModelParametersForPlLines.DampingFactorPl4 = 1.0 * i + 0.12;
                 location.ModelParametersForPlLines.DampingFactorPl3 = 1.0 * i + 0.13;
                 location.ModelParametersForPlLines.PenetrationLength = 1.0 * i + 0.14;